1. Maeda Veterinary Hospital, 1–4–8 Yamatemachi, Tomakomai, Hokkaido 053–0851, Japan
2. Department of Biochemistry, School of Life and Environmental Science, Azabu University, 1–17–71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252–5201, Japan
3. Department of Food Biochemistry, School of Life and Environmental Science, Azabu University, 1–17–71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252–5201, Japan
4. Veterinary Teaching Hospital, Azabu University, 1–17–71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa 252–5201, Japan
5. Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, 1–8–1 Inohana, Chuo-ku, Chiba, Chiba 260–8677, Japan